Blast furnace tapping ditch operation and maintenance method and tapping ditch

Abstract

The present application provides an operation and maintenance method for a blast furnace tap ditch and a tap ditch. The operation and maintenance method of the blast furnace tap ditch includes the following steps: determining the single limit iron flux t of the tap ditch n , n is a natural number greater than or equal to 1; it is detected that the actual iron flux is greater than or equal to the single limit iron flux t n When , it is determined to carry out the n-th residual iron discharge detection on the tapping ditch; the operation and maintenance mode of the tapping ditch is determined according to the results obtained from the n-th residual iron discharge detection. The technical solution of the present application is by setting the single limit iron flux t n Improve the accuracy of judging the detection timing of residual iron discharge, and then repair, dismantle, rebuild and combine the operation and maintenance methods of the tapping ditch according to the results of the n-th residual iron discharge detection. Tapping trench refractory materials are effectively and fully utilized, reducing the loss of refractory materials and prolonging the service life of the tapping trench.

Description

technical field [0001] The present application relates to the field of metallurgical ironmaking technology and equipment, and in particular, to a method for operating and maintaining a tap ditch of a blast furnace and a tap ditch. Background technique [0002] The blast furnace tapping ditch is an indispensable channel for blast furnace tapping. As an important facility in the ironmaking production process, ensuring the safety and reliability of the tapping ditch system is a prerequisite for ensuring the normal smelting of the blast furnace. There are many uncertain factors in the use of the blast furnace tap ditch. The refractory construction of the tap ditch system is mainly based on the actual condition of the slag and iron. , Each tap ditch system needs to be repaired and maintained in turn. [0003] In the tapping trench system, compared with the molten iron below, the slag has a smaller specific gravity and higher temperature, and the refractory material near the liqu...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when the side wall of the tapping trough has a large melting loss, the refractory material of the tapping trough is generally dismantled and overhauled, resulting in the thickness of the excess refractory material at the lower part of the side wall iron line and the bottom of the tapping trough body cannot be It is effectively used, resulting in waste of refractory materials, increasing the amount of maintenance and repairs, and shortening the amount of iron passing through the tapping channel and its service life

Images